Applications
900-0209-01-00 Rev A 71
Grid-Interactive Settings
When using an OutBack inverter, FLEXmax 100, HUB Communications Manager, and system display,
set the Grid-Tie Mode menu to Y in the system display. This mode allows the inverter to manage the
charge controller’s Float setting. It ensures the controller always keeps the battery above the sell voltage
of the inverter. (See page 44.)
When using a FLEXmax 100 charge controller with an inverter without the use of a HUB, GT mode will
not work because the charge controller cannot communicate with the inverter. In this situation, when
selling electricity back to the grid, keep the inverter’s “sell” voltage setting below the charge controller’s
Float setting. In a 24-volt battery system, the difference should be at least 0.5 Vdc. In a 48-volt system,
the difference should be at least 1.0 Vdc.
Definitions
The following is a list of initials, terms, and definitions used with this product.
Table 15 Terms and Definitions
Term Definition
AC Alternating Current; refers to voltage produced by the inverter, utility grid, or generator
AGS Advanced Generator Start
AUX Charge controller’s 12-volt auxiliary output
CE Conformité Européenne; French for “European Conformity”; a marking on OutBack products
indicating that they meet European Union requirements
DC Direct Current; refers to voltage produced by the batteries or renewable source
Derate Automatic reduction of the FLEXmax 100 rated output of 100 Adc; usually performed for
temperature reasons
DVM Digital Voltmeter
EMI Electromagnetic Interference; a detrimental condition that affects electronic circuits
FET Field Effect Transistor; a reference to a temperature reading by the FLEXmax 100
FN-DC FLEXnet DC; the OutBack Battery Monitor
GFDI Ground Fault Detector/Interruptor; shuts down the system if a ground fault event occurs
Grid-interactive,
grid-tie
Utility grid power is available for use and the system is capable of returning (selling)
electricity back to the utility grid
Ground Fault An unsafe condition of current flow to ground, resulting from accidental contact between an
electrical source and ground
I
mp
Maximum-power current; the current harvested by MPPT when operating at the V
mp
I
sc
Short-circuit current; the fully-loaded current displayed by a PV module or array
LED Light-Emitting Diode; refers to indicators used by the FLEXmax 100 and the system display
MPP, MPPT Maximum Power Point, Maximum Power Point Tracking
Negative-Ground A wiring system that bonds the negative conductor to ground for safety
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